diff --git a/11_deep_learning.ipynb b/11_deep_learning.ipynb
index eecfa1a..f63c59b 100644
--- a/11_deep_learning.ipynb
+++ b/11_deep_learning.ipynb
@@ -1197,6 +1197,7 @@
     "n_hidden2 = 50\n",
     "n_hidden3 = 50\n",
     "n_hidden4 = 50\n",
+    "n_hidden5 = 50\n",
     "n_outputs = 10\n",
     "\n",
     "X = tf.placeholder(tf.float32, shape=(None, n_inputs), name=\"X\")\n",
@@ -4648,7 +4649,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.5.5"
   },
   "nav_menu": {
    "height": "360px",